show a helpful error for nonexistent tradition

diff --git a/lib/stemmaweb/Controller/Relation.pm b/lib/stemmaweb/Controller/Relation.pm
index cd0b957..7e537d9 100644 (file)
--- a/lib/stemmaweb/Controller/Relation.pm
+++ b/lib/stemmaweb/Controller/Relation.pm
@@ -56,8 +56,14 @@ sub definitions :Local :Args(0) {
 
 sub text :Chained('/') :PathPart('relation') :CaptureArgs(1) {
        my( $self, $c, $textid ) = @_;
-       # If the tradition has more than 500 ranks or so, split it up.
        my $tradition = $c->model('Directory')->tradition( $textid );
+       unless( $tradition ) {
+               $c->response->status('404');
+               $c->response->body("No such tradition with ID $textid");
+               $c->detach('View::Plain');
+               return;
+       }
+       
     # Account for a bad interaction between FastCGI and KiokuDB
     unless( $tradition->collation->tradition ) {
         $c->log->warn( "Fixing broken tradition link" );